Abstract—

A technique for visualizing supersonic underexpanded gas jets flowing from sonic or supersonic nozzles into a rarefied space with a pressure of 0.2−100 Pa has been developed. The technique is based on exciting the luminescence of a gas jet moving according to the prescribed law relative to a focused electron beam with a diameter less than 1 mm. The luminescence of the excited gas was read by a scanner and transformed into an image. The density of the gas jet was quantified by the image brightness using the developed software.

中文翻译：

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一种扫描稀有气体超声速射流的高效方法

摘要-

已经开发了一种可视化技术，用于可视化从声波或超音速喷嘴流到压力为0.2-100 Pa的稀疏空间的超音速膨胀不足的气体射流。该技术基于激发相对于直径小于1毫米的聚焦电子束按照规定规律运动的气体射流的发光。激发气体的发光通过扫描仪读取并转化为图像。使用开发的软件，通过图像亮度定量气体喷射的密度。